Panasonic MN1030 user manual Table below lists the conditional assembly directives

Chapter 10 Writing Assembler Control Statements

The table below lists the conditional assembly directives.

Directive	Condition for selecting block1	Condition for selecting block2
#ifdef	Identifier has been defined by #define.	Identifier has not been defined.
#ifndef	Identifier has not been defined by #define.	Identifier has been defined.
#if	Expression value is not 0.	Expression value is 0.
#ifn	Expression value is 0.	Expression value is not 0.
#ifeq	Parameters 1 and 2 are the same string.	Parameters 1 and 2 are not the same string.
(see note)
#ifneq	Parameters 1 and 2 are not the same string.	Parameters 1 and 2 are the same string.
(see note)
#iflt	Expression value is negative.	Expression value is not negative.
#ifle	Expression value is 0 or negative.	Expression value is not 0 and not negative.
#ifgt	Expression value is positive.	Expression value is not positive.
#ifge	Expression value is 0 or positive.	Expression value is not 0 and not positive.
#ifb	Parameter is the null character.	Parameter is not the null character.
(see note)
#ifnb	Parameter is not the null character.	Parameter is the null character.
(see note)
NOTE:	These directives can be used only within macro definitions

190 Conditional Assembly